.home-intro .intro-item::after {
    content: "";
    position: absolute;
    clip-path: polygon(100% 50%, 0 0, 0 100%);
    top: 0;
    left: 0;
    width: 25px;
    height: 100%;
}

.home-intro .intro-item:nth-child(2)::after {
    background-color: #f3f3f3;
}

.home-intro .intro-item:nth-child(3)::after {
    background-color: #E3E3E3;
}

.home-intro .intro-item:nth-child(4)::after {
    background-color: #D9D9D9;
}